WVO wanted in Tucson

I haven't yet converted my old Mercedes to WVO. I'm weighing the cost/benefit ratio according to anyone who might be able to supply WVO to individual consumers on a smaller basis such as 100 gallons per month at a reasonable price.
If there are such suppliers, what would be the approx. cost if I'm located in Tucson? Can I save money by picking it up myself or simply filling up at a specific location?
Again, I'm trying to get some ballpark figures to find out if investing in a top-dollar conversion kit will be worth my money in the long term. I'm just south of the AFB in Tucson.
My e-mail is
miljohnj5 at Yahoo com

Thanks.

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