My friend Francis Bernier will soon be offering a new type of 64k RAM expansion for the VDC.
The traditional type of 64k expansion board for the VDC simply disconnects the two 16k x 4 DRAM chips from the mainboard and offers a pair of sockets for two 64k x 4 DRAM chips. Francis's new type is much smaller, consumes much less power and uses a single static RAM chip.
On various forums and here. Pricing at 18$US per unit. Just send me a PM once we have a few boards out of the fab.
Forgot to mention there will also be a version of this board which will provide 64k expansion for the Commodore 16 internally. A very small board you slide under the TED and it will work with ALL versions of the Commodore 16 and cost 18$US (15 Euros) too.
The version for the C64c is presently available at the same price.