Tweetgood and cheap don't work well you can have one or the other.
if you want a good a PCT I suggest swales protocol. Your source options for PCT are very good. A lot of research places on line have great prices. I hope this helps somewhat, because swales pct protocol is a guideline and everyone is different. I cannot stress the fact enough that a good PCT is worth its weight in muscle. You can find a good pct protocol but you'll never find a good cheap pct IMO.