Avatar uses modified Deltalite IIs in their Neo cabs. The only way to get 16Ω versions is to order some from them, and they seem to have an exclusive agreement with Eminence that discourages that.
Unless you order like a hundred at a time, you won't find any 16Ω Deltalite IIs, or basslites either, for that matter. Welcome to the wonderful world of DIY.
Fender Jazz, ESP LTD Viper 304, Peavey, Proctor Silex, Whirlpool, Sears Kenmore.