I found a R280 at Ritz last year when my R320 "reached the end of its life" according to the LCD. I'm not sure if they're still available.
Bill, when that pops up, there is still oodles of life left in that printer. All that has happened is that the ink sponge thingy that soaks up the ink when you start it up or clean the heads manually, has supposedly gotten full. However, they use a counter to determine when the thing "should" be full. They don't want you getting ink on stuff, ruining it, and suing them so they build lots of pad into that number. Here is a link to one such counter resetter but there are a bunch of places where you can find them.
https://www.fastweb.co.uk/page-net/programs/sscserve.exe Or just Google search for "Epson printer counter resetter" or something close. These things work like a charm and will get you lots more life without replacing that pad. Beware you might want to set the printer on an old towel or soemthing...just in case.