Hi guys.
I have a Thermolyne 3f-A1850 oven that is bonkers.
It heats up to 900 degrees quickly then stops for a while then shoots up to 2200.

Three questions:
1) Are repair parts available? I have looked to no avail.
2) Is there an electronic upgrade (digital) available?
3) Where can I get low-cost brick?

Thanks again for your help.