67 Barracuda Bucket interchange

My bucket seats in the 67 barracuda are a bit raggedy.
Couple questions....I know I could get new foam pads, and covers. Expensive. The seats themselves are fine.
Does anyone know what seats from a pick and pull would easily fit on the existing tracks? I am not picky about keeping it stock.
Or a good suggestion for a cheap replacement seat cover that just slides over?
Just trying to figure out the cheapest way to handle it.
ANy advice appreciated.

If you look around at places like ebay you'll find lots of pull over seat covers but... they are made for high back buckets. A sewing machine can fix that.