For a rear sump pan we are going to try the one cast by a guy in Calgary, Canada. He posts on the Bangshift Forum using the handle "efi-diy". For motor mounts the ones for flathead Ford (32-48) are primo to us, super simple, won't shift, and impossible to tear up (picture).
I figured you had one of Marc's (EFI-DIY) pans planned. Every time he has had a batch, I've never been in a position to buy one. We have a couple Aluminum boat builders around here, I figure I can always have a sheet metal pan made if the need be.
I bought some engine mounts for the frame side, but made my own for the engine side. I currently have Ford Taurus isolators, but may dump them in favor of the biscuit style you have, since they won't pull apart. Like I said previously, the IFS addition, changed things, so I'm going to have to re-work them anyway.