What's the best way to attach roller & slider brackets to my glass shower doors. I've tried some epoxy, but they come off. I'm missing a couple of the brackets and I'm having a hard time finding replacements. Any suggestions?

Do you have a Home Depot in your area? They are online at HomeDepot.com they have a whole section on the nuts and bolts aisle. It's a little spot about 5ft x 5ft that has shower door hardware, slider door hardware, window cranks, magnets, and all those weird things. In my HD it is directly across the aisle from the chains and rope by the foot dispenser... and across from the Velcro section. Check there first. If no luck there... look up a deconstruction salvage yard in your area. It's like a pick a part for houses. You may be able to find a replacement piece there.

OR you could spring about $80 for a brand new set of doors, with new sliders and brackets.

What's the best way to attach roller & slider brackets to my glass shower doors. I've tried some epoxy, but they come off. I'm missing a couple of the brackets and I'm having a hard time finding replacements. Any suggestions?
For a normal 30" 1/4" glass shower slider usually a top mounted track with a wheel carriage... the wheel carriage mounts by clamping onto the glass via screws... best bet is to seek out a local shower door glass shop which fabricates... they have the parts and hopefully they will sell them to you... if you can nail down the original fabricator of the doors that is extremely helpful... usually the name is posted @ the handle..

Did you clean the areas before you used the epoxy?
Can you just buy a new frame and door from Lowe's or homedepot

Found the site last eve > Cardinal Shower Enclosures - Welcome (http://www.CardinalShower.com) < this site will locate distributors in your area who you can contact for shower door hardware... this is a division of Hoskin Muir Co. which manufacturers metal extrusions.

Here's a shower door rollers specialist, Di Vapor, so try them out here (https://www.divapor.com/spares/showers/door-rollers/door-rollers.php).