Unless you really don't like the bed as far as how it sleeps, I wouldn't replace it. It's a good bed. The company is actually Innomax in Denver - the Ideal Rest is name used by Winnebago for their spec Innomax bed.
InnomaxI actually broke our pump valves when I caught the hoses in the bed lift (Dealer had it all messed up when they replaced limit switches). I carried the pump into the shop and he fixed it while I waited. Quoted my $40, but only charged $8. Super nice folks there.
Parts can be had on Amazon as well.
DW and I like the bed. Sleeps wonderful.