2007 google ngrams count:
愛玩者	145
Not an entry in the kokugo 
dictionaries/eijiro/weblio's ei-wa 
dictionaries. Not given as an example in any 
of the kokugo 愛玩 entries either.

Thank you for the submission, Chase. 
Unfortunately this word doesn't meet our 
requirements for inclusion. You can have a 
look at our editorial policy about the type of 
things we normally include, and don't, here:

http://www.edrdg.org/wiki/index.php/Editorial_
policy#Is_it_worth_including.3F

(sorry about the link coming out mangled on 2 
lines)

漢字熟語字典 - compound listed under 4f4.1