So I blew a 6v6 in my RV50 and I plan on buying 4 JJ 6v6S to replace the old 6v6s but I need help with rebiasing.

This website sells multimeters and the adapters needed, called "bias probes"

Would it be alright if I bought one multimeter and one bias probe to rebias all 4 tubes or do I NEED to buy the "Weber BR-2-2 Quad bias Probe"?

Or if anyone has cheap suggesions, I'm up for it. My local shop said it'd cost AT LEAST $120 to bias my amp !