After months of looking for this seemingly elusive tool that scalpers online like to charge 2x for, I finally found 1 in stock at my local HD : r/ ryobi
New Ryobi Plus Heat Gun P3150 for Sale in Orangevale, CA - OfferUp
20V Cordless Heat Gun - Tool Only
RYOBI ONE+ 18V Cordless Heat Gun with HIGH PERFORMANCE Lithium-Ion 4.0 Ah Battery and Charger Starter Kit P3150-PSK004 - The Home Depot