Jason try dragboatracing.com
Are you looking for Dry or Water Injected ones. I have a set that look just like the ones in the first photo you posted, they are Dry. I also have a water injected set of Bassetts. The Dry ones have 2 1/8 tubes $200. The water injected ones are 2 3/8 tubes for a blown motor, $225. Both are in good condition.