The tigeress ones for sale on ebay (
TIGRESS TUNA SWIVEL ROD HOLDER ROD LEES RUPP OUTRIGGER | eBay) can still be had for $390+ shipping. That boils down to about 100 bucks each, not to bad.
That guy is giving you a choice of angle and length...I bet if you ask him he will sell you 2 of exactly what you want. Shoot him an email.
If not...get these:
There is a local shop (fishermensoutfitter) that sells these:
90 Degree Swivel Base Rod Holder there are other places too, I think CMS has them as well.
Best of luck
Threaded Mode