I think they are/were made by "Falcon" who are owned by NSP Engineering, and who also own Air Arms.
I also think there was thread on here a couple of weeks ago suggesting that NSP are going to wind up the Falcon brand. If that is the case, then it seems likely that the RWS LRs will become "obsolete", so there may be a push to sell off remaining strock. This is only speculation of course.