fuel tank needed

I need some type of period correct type fuel tank for my Boonie. I am using 5hp flathead Briggs but it is modified extensively. It does not have a pulsa jet carb. I was thinking maybe a tecky type tank that I can bolt to the head bolts on the front of the engine. Something cheap. Any tank really as long as it's 1-2 qts and I do t have to weld brackets to my boonie.