Which surfactants? My first hit in Google Scholar uses Span 80 and Tween 80 - in the Aldrich/Sigma catalogues. Would be interesting to try PGPR, a polymeric surfactant used in the food industry to make very temperature stable inverse emulsions. Can be sourced from Danisco - recently bought by Du Pont. Don't forget to put my name on the paper if it works ;-).
Would be grateful for the reference you found in Google Scholar that uses Span 80 and Tween 80. My search hits all used surfactants (Tegosoft DEC & ABIL WE) from a company called Degussa, which I think focuses on formulations for cosmetics:
http://arep.med.harvard.edu/Polonator/polony_protocols_12Dec07.pdf
http://www.labtimes.org/labtimes/issues/lt2011/lt01/lt_2011_01_50_50.pdf
http://pubman.mpdl.mpg.de/pubman/item/escidoc:1583875/component/escidoc:1583874/Sch%C3%83%C2%BCtze_sdarticle.pdf
http://www.nature.com/nmeth/journal/v3/n7/full/nmeth896.html
Degussa is not interested in biomedical research and is essentially impossible to order from. If PGPR works, I would be more than happy to give credit where it is due!
I understand your supply problem. Probably PGPR would pose the same problem. What I read was Journal of Biotechnology 102 (2003) 117/124 (on researchgate. I Googled "PCR water in oil emulsion"). Actually Tween & Span did not work well for these authors. They just used good old Triton X100...
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