While US Palm is still working on their folding stock, Gabe Suarez just released a picture of his company's new folding stock in this thread that they will be using. My first thought when I clicked on the thread is that it would be the new US Palm stock, and it may or may not be since Suarez is a little vague (it is not US Palm, see update). It allows M4 style stocks to fold to the left or right depending on the adapter used. No word on price yet. ACE does have a similar setup with a "pignose" adapter for their folding mechanism.
UPDATE: Definitely TSDs, the folding mechanism based off the Galil is what is offered, no buffer tube or stock. Available here for $125