Don't toss that drive yet. As they are sending you a new drive, it would not hurt to see if you could get your data off of it by slaving it up. The most you stand to lose if it doesn't work is a few minutes.
If slaving the drive to the new one still doesn't allow you to access your data, then you will want to send it in to a data recovery specialist if you really need the data. Be forewarned that data recovery guys are HUGE cash. There are a variety of freeware/cheapware "data recovery" programs that claim they can do the job, however, most do not.
The Trep pictures can be recreated for the most part if you take it back to the shop to grab the underbelly pics. The only question you have to ask yourself is if you have hard copies of the other pictures (first steps) and your financial statements.
If you have hard copies of the pictures, you can always scan them in again - either with your scanner (if you have one) or at a place like Kinko's (if you don't).
The financial statements (which you should be able to get from your bank and/or brokerage) can be used to recreate your Money file. Granted you will have to re-input all of your bills and whatnot, but other than your historical information, you'll be able to recreate it none-the-less. Your bank and/or brokerage may even be able to supply you with a great deal of the historical info.
Who knows, if you ask in one of the "general" forums you may find that someone has actually downloaded and saved to disk your dual exhaust pictures.
In summary, try the slave idea first. It may work fine and save you a big headache. Secondly, see if you can recreate the data by performing the above suggestions or similar. Thirdly, if the first two methods fail, call a data recovery company or two and see what the costs are and weigh them against what the data is worth to you. Also, be aware that the data may, in fact, be unrecoverable by the data recovery guys. You will have to pay them something for their time even if they don't get the data back as they expend the same effort regardless of if the data is there or not.
P.S. The advice may be a day late and a dollar short, but you should consider investing in a backup solution for your data. The best bang for your buck currently is to buy a CDR (at roughly $75-$200) and a bunch of blank CDs (at roughly $.10-$1.00 per disk). CDs can store 650MB of information which according to your info above should be plenty of capacity to store whatever data you want. Every X number of days you should copy the data files that you know you don't want to lose to a blank CD, date the CD, and store them wherever you want. That way in the case of a catastrophic failure such as this (there will be more down the road...it's Murphy's Law) you can fairly easily recover.