For Solarforce, you should be able to run with - Solarforce L2M (short section of 2-section body ) with Solarforce 18650 body extender = 2x18500 or 2x14500/AA with sleeve

Other pricier options - Malkoff MDC HA 2AA or any 9P-type body with sleeve to make up for battery width.

AA’s might work for lower level output but might be challenged driving anything more.
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edit - “never mind”, I completely missed that you wanted to run off of single AA.