I have btc on Electrum mobile wallet.
I want to buy a hat using crypto from an online vendor.
Vendor accepts several crypto currencies.
It's a one time purchase.
I don't want to spent more than 20 cents in transaction fees.
I want the transaction confirmed within a couple of hours.

What are my options?

I thought of Lightning but that is still going to cost me a lot in transaction fees when opening a channel. And since this is a one time purchase, it defeats its purpose because, well, might as well just directly purchase using btc.

So...what can I do?