I don't see why one could not use them for gas, but I have heard that the MFC and the water can have different gaskets (rubber vs. viton for gas). But, if you look at the construction of the water cap...awww hell...try it and see.

Here you go, Sparkem, LC Industries base supply center retail locations:

SOUTH CAROLINA

Beaufort - LCI Servmart
MCAS-Beaufort, Bldg. 612, Bay #10, Beaufort, SC 29904
Phone: 843.521.1907
Charleston - LCI SSSC
NWS Charleston, 2450 Red Bank Rd., Bldg. 910, Goose Creek, SC 29445
Phone: 843.824.2421
Ft. Jackson - LCI-RDC
Essayons Way, Bldg. 2522, Fort Jackson, SC 29207
Phone: 803.790.5306
Shaw AFB - LCI-BSC
316 Chapin St, Bldg 216 Dock A, Shaw AFB, SC 29152
Phone: 803.895.9355

89 Mitsubishi 2dr. V6, winch, Snorkle w/FF boot, Aisin's, sway bar discos, 15x8 rockcrawlers, 33X12.5 BFG MT's, KV85's, Snorkle install
94 Toyota x-cab, totaled
99 Dodge 2500 diesel, sold