I have for sale six used, working Advance REL-2P32-RH-TP electronic 2-lamp T8 ballasts. These are short-lead ballasts. Ballasts have full-size cases (like comparable magnetic ballasts). The label calls these rapid start but they are actually instant start ballasts. There's no startup flicker; they just come on with very minimal delay. They just have one wire to each lamp end, too. They aren't great for EOL shows but they will occasionally give a bit of a show. Label says minimum temperature of 50F but they work just fine even below freezing.

These came with some old louvered fluorescent fixtures that I finally converted back to T12.

Cost $8.00 plus actual shipping for all 6. Located in East Jordan, MI USA 49727.

These are great ballasts. I installed several dozen 25 years ago in a religious institution. Not one has failed.