Funny, I've been looking for the exact same thing recently.

Best I've found is this website: Bongs Parts

They sell the slider + glass female part for $15....not bad. If you buy from here tell me how it works!
Adjacent Reviewed by Adjacent on . WEBSITE FOR SLIDER BOWLS AND RECIEVERS all my local head shop has is $40 glass slider bowls. they are nice but all i want is a regular nothin artsy good size slider bowl and female reciever (glass or metal will work) to build a homemade glass bong. anyone know a good discreet website that sells el chepo sliders? i have a water bottle / socket bong with a carb that serves me very well. but now i want something more professional looking than a 2cent water bottle.and i like the ease of using the slider bowl compared to holdong a carb. Rating: 5