Here is the Kent Moore Caliper Compression Tool.  PN J-42553. Took about 3 months to get since is it only made when they have enough orders for it.  It sells for about $350.  This photo here shows it together.
	There are three parts to this part here.  The plate, the stem, and the outer stem.  To use the tool, you would place it in within the caliper and turn the outer stem to compress the cylinder, after you have given it about one complete turn, you will then turn the center stem, this turn the piston itself. You will be able turn it about one turn also before it get hard. You will go back and forth between the two stems until you have the caliper fully compressed.
	Here is the socket the will fit over the piston of the caliper.  J-41300 - Socket/Adapter in chrome

After using the tool to do a brake job, I found that first getting the piston to turn is not always so easy, and you will need a wench with some length to it.I used my tourqe wench and had it set for 40 ft-sq.  Worked great.  As you are turning the center post, it will turn the piston and compress it for you at the same time.  Now it will come to a point where it is not being compressed enough and it will be come hard to turn, so you will need to turn the large part of the tool.  If you do not turn the center post to the point where it's to hard to turn, you will be able to turn the larger nut by hand as I did.  To help keep the caliper in place while compressing the rear caliper, I bolted the bottom part the back into place to hold it down while I turned it.

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