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Amazon [amazon.com] has 5′ Flame King Steel-Braided Propane Adapter Hose w/ QCC1/Type1 to CGA600 for $11.89.
Shipping is free with Prime or on $35+ orders.

Walmart [walmart.com] has 5′ Flame King Steel-Braided Propane Adapter Hose w/ QCC1/Type1 to CGA600 (SS-QCC-1LB) on sale for $11.89. Shipping is free with Walmart+ (30-day trial for $1 [walmart.com]) or on orders of $35+.