Cactus radio triggers, off of the bay from china. Gadget Infinity was the vendor, as I recall.
V2 or V4s' are the bunch I have. Not fancy, works reliably for me, and I believe that are rated to 300V. I use them on all sundry old flashes I have except for my ancient pack and head GN 200 in feet ' Braun that goes to 585v trigger voltage on full power. I save a wein optical trigger for that baby; it has killed lesser vendors' optical offerings after a few days use.
I think one tx and a pair of rx's of the Cactus are about $70. I have three sets of them now, and all still working after more than 4 years. Keep spare batteries in the box or bag, and remember to turn off the rx;s when stored and you will stay happy.