What do you guys suggest as an efficient way to locate the parts I need used? I am thinking I can email the annual report to wentworth and see what parts they can find for me used. Does that sound like a good approach? Any other companies like this?
I am going to plead with my friend to let one of my mechanics in the shop to do the grunt work. Then the a&p can inspect it and sign off.
If you don't have them yet, you need to find a set of maintenance and parts manuals for your serial number, then you will be much more successful with the salvage guys and other shops.
With a bit of patience, these can be found online or on ebay at a reasonable cost. I prefer the printed manual to the scanned manual, but the scanned ones work in a pinch and you can get often get one much quicker.
Once you have the correct manufacturer's part number, then you have a much better chance of finding the correct part. Call the salvage yards, as well as the shops that specialize in the type and/or sell mods, and remember that Google is your friend.
Also, make sure your mechanic is OK using parts that you source. Some shops use parts as another revenue stream, selling them at "list" price, plus a percentage fee on top of that. These guys may not touch anything you bring in, or will charge you for them.
Another risk of bringing in your own parts is that if there is a problem with them, the shop is more likely to charge
you the labor to get it right.
You really need to develop a relationship with a mechanic that you can trust (and vice-versa) if you want to go this route. Get the trust level to the point that you can help him/her source parts, prep the plane for annual, and where you can do some of the grunt work "under supervision" and he/she is willing to sign off.
This will likely take time and personal references, but is well worth the effort.