RBS50 substitute?

[RTracey]

I have an RBK50 system and would like add another RBS50 satellite - yet it seems to have been discontinued or unavailable everywhere, even though apparently you can continue to buy the full system.  Is Netgear forcing people to purchase a whole new system if they want to add a satellite?  No way I'm doing that, so is there any acceptable substitute for the RBS50? Thanks. 

[Jetdrive]

If you don't mind used, check out eBay. There are several available there starting at $100.

[RTracey]

Thanks Jetdrive. I might consider used, but would prefer new if there are viable options.