Thuglife, there's a canadian site called
http://www.precisioncolors.com that sells Image Specialists inks. Image Specialists ink is the same as MIS inks, they make it for them. MIS/Image Specialists Epson inks are pretty much identical to that of Epson.
As for the R200 vs R220, there is a difference in the chips in some CIS'. The R200/R220 use the same original cartridges from Epson, so you would normally think that they should be able to use the same compatible cartridge. No, ain't necessarily so. It depends on how the autoreset chip was programmed. It looks like Epson changed the firmware in the R220 to look for something on the chip that the R200 never looked for. So always buy a CIS specifying the printer you want to use it on.
Also watch out for sediments in the bottom of the ink reservoirs! Apparently algae grows at the bottom after a year or so. MIS recommends washing out the reservoirs periodically and they have been selling CIS for quite a number of years. That might be a bit inconvenient on the chinese bottom feed systems.