I'd recommend calling Maxim Oil Co. in Fort Worth, TX... they have a few different quenchants for sale, including their own brand, but they also carry Parks #50 which is one of the fastest (if not THE fastest) oils you can get for quenching 1095.
Here is an excerpt from an email from one of maxim's reps:
"Also, we finally received the Park #50 and now have eleven 5 gallon pails in
stock in Ft Worth, TX. If you don't mind... please spread the word as I
would like to sell most of these #50 pails prior to getting more.
I have been trying to find ways to lower the costs.
As of 12/29/10, Maxim will offer the following to any who might call:
Duratherm 48- in a 5-gallon pail, 12.50 per gallon(62.50), plus fedex frt.
From Fort Worth, TX
Park # 50- in a 5-gallon pail, 14.50 per gallon(72.50), plus fedex frt.
From Fort Worth, TX
Folks need to ask for Carla(817-293-4-OIL); she takes most credit cards and
will be able to "fixem-up".
I've scoured the internet and talked to several people over the last several months, and I have NOT been able to find it cheaper than this, if I can find it at all. It's definitely worth the investment if you can afford it, and if you plan on making a lot of knives.