While I know it isn't an exact match to the flavor you can get from Wok Hei, I've pulled off some great dishes using a wok intended for electric stoves. Being a renter, finding apartments with a gas range in my area of the US is impossible. So I've made due with a wok with a slightly flatter bottom to help assist.

I haven't tested it yet, but using a kitchen torch is another option to add that flavor depth. Serious Eats has a write up on it and I've seen Kenji use his as well to intensify the Wok Hei.