FCP Groton lists the mounts for this:
274110A Left Motor Mount all 75-93 240 Gas Engines $6.95 Scan Tech
274111A Right Motor Mount all 75-93 240 Gas Engines $6.95 Scan Tech
1359138 Tranny Mount all 4 speed w/o Overdrive (square) $6.50 Scan Tech

Replacing the motor mounts is a bit harder than the trans mount but you can do it with a floor jack and normal tools. Suggest degreasing everything especially on the right side since the oil filter always makes a mess on that one. (But you knew that already).

BTW I wouldn't necessarily expect a tuneup to include a check of valve clearances unless specifically asked for. These cars need a valve adjustment maybe once in their lives. Maybe. See IPD's page (www.ipdusa.com) for more info about valve adjustments and shim kits. These aren't like most cars - adjustment is made by substituting shims of different thickness under the cam. It's a very reliable system but adjustment is tedious and requires a complete selection of different shims.
I've *never* adjusted valves on a B230. They never need it under most conditions.
Good luck!
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Rob Bareiss, New London CT ::: 'Roterande Fläkt Och Drivremmar!'