I got mine at Home Depot and cut them in half and used them as a spacer between the bottom glass and side glass pieces of a large tank I was building. You wouldn't need to cut them. Then space every inch or so along the acrylic panels (you would need hundreds)
The ones I used were self adhesive, I stuck them on the glass first then applied the glue then pressed the pieces together. This made about an 1/8" space between the two pieces, keeping the glue in place. The glue completely surrounded (encased) the bumpers preventing any kind of leaks through the bumper area.
CLEAR DOOR BUMPER (50/CARD)
Item:
WY10065 Your Price:
$ 3.95 Quantity:
Cushions door and drawer closing
Creates non-skid surface
Material: Soft rubber
Diameter x H: 10 x 3 mm
Finish: Clear
50 self adhesive bumpers