Hey everyone, new bass player here! I just acquired a Peavey Mark IV (with 2x15 cab) from a friend and quickly found out that not having a foot switch would be an issue. I was trying to find one online but only came across old beaten foot switches or astronomically priced ones. I called Peavey CS and they directed me to ampfootswitch.com to get a brand new one with the proprietary 6-pin DIN. At the time of this post it is $64.95 - which is still pricey, but at least it is new. I just wanted to post this because it took me a while to find that information regardless of several internet searches. Have a good one!