I seen on Hobby Search that Dragon made a sherman jumbo is it still available?

The Dragon Jumbo was never released. Look for Tasca's/Asuka's offering. Their line of Shermans are incredible kits and almost build themselves.

Michael's right. Dragon released a "teaser" advertisement in response to Tasca releasing a Jumbo kit, but Dragon never released the kit itself. The Tasca kit is a jewel though, and while there's lots of parts, it's not a difficult build.

I am the middle of building one now and it has gone together like a charm. No fit issues and only some minor flash and sink holes to deal with. The hatches could have been better detail, mainly the commander hatch, it has no detail at all.

I liked how they have you insert spacers in the spring assembly for the road wheels so it simulate the spring arms on the front road wheels being almost horizontal due to the weight of the extra frontal armor and the others lower then a normal Sherman.

The machine guns are awesome.

I have to agree, Tasca shermans are a pleasure to build, really enjoyable!