Doug,
I've been shopping for motor mounts, too. I tried Advance Auto Parts today, and they showed me a round motor mount, like for a later year SHO, not the square shaped kind on my '89. They were #M6344 Front $30.99, #M6898, Rear $31.19, #M6543 Transmission mount $50.00. Their website shows different numbers: Anchor brand (made in Israel) #2623 Front, #2622 Rear, and a Trans mount w/similiar # I did not record.
Autozone.com also offers the Anchor brand, same #'s and all less than $30 each, but the Anchor mounts are for a regular Taurus 3.0 or other - I have a set here to be returned. Yes, they're square in shape but the front and rear mounts are totally different and will not fit. I thought I had a real bargain for a while there... a bit disappointing, for sure.
Ford dealerships, The Ford Parts Network, Shonut Performance and Sho Shop all have the correct mounts, but at different prices. Sets of all three: Ford $284.39. FPN $241.00. Shonut: $251.73. Sho shop: $347.00. The first two are oem, the second two 'reinforced.' Ford #'s Front F1DZ6038C Rear F5DZ6F063D Transmission E9DZ6068A.
There's the info...You've gotta pay big to get the right parts on some items. I plan to keep shopping around, and let these guys know they're selling the wrong parts.
I'm looking forward to the day I finish installing the new mounts and get on some high spirited motoring... I'm about halfway through the 60k service on my 180,000 mile car.