After Kevin's reply, I remembered that Loper's Performance still has their main store open in PHX. So I called asking about a Snell helmet. The employee had absolutely no idea how one could go about purchasing one. I was flibbergoosted. How can this place sell race parts but no helmets?
A quick search reminded me that SoCal Speed has a branch in PHX also. I called at 5:30 even though they close at 5:00, confident that they would KNOW that the omnipotent FElony was on the line. 22 rings later, I had to admit defeat. Drat!
The biggest Harley dealer in AZ is close by, somewhat. I'm sure they don't stock Snell-spec. But maybe they can, as suggested, size me and order something from Bell or whoever.
I suppose I can finish up the odds and ends on the car first. I hid an Easter egg about it, but nobody found it.
Thank you to all repliers.
I was going to mention Lopers, thinking you were in Arizona, I was just there a couple weeks ago, but I knew the part I needed, sad it sounds like the counter person wasn't much help. Likely they have one or two people with a clue, and the rest less so. Arizona has quite a bit of circle track racing - maybe there's a shop that specializes in circle track racing?
Motorcycle shops might have some Snell helmets, maybe just not a wide selection, but one thing to be aware of is there are differences between a "M" ( Motorcycle ) Snell rated helmet and a "SA" rated helmet. My understanding is one thing for example "SA" rated helmets are tested for specific fire resistance, "M" are not, since you would be more likely to be trapped in a fire in a car than on a motorcycle. Motorcycle helmets are tested for different impact resistance than "SA" helmets, etc. ( I'm not a helmet expert, so someone can weigh in if they want ) For drivers in most of the ET classes it's not a problem to use either a "M" or "SA" rated helmet, but the faster you go, or chassis type, or fuel type, or Supercharged for example, there start to be very specific helmet requirements, so a person would want to consult the rules, and "M" rated helmets won't pass tech. 9.99 and faster you need a full face helmet, open face are not accepted faster than 9.99. Also, by NHRA rules, helmets "expire" based on the Snell rating year, so don't buy one too soon before you need it. Also know that many retailers reduce the price on helmets with older Snell ratings not long before they are going to "expire", so beware that a really good deal might be because the helmet will only be NHRA legal for a few more years.