Agreed, Mastercool is an easier tool to use off the vehicle and has a few more applications. With that said the two are different tools, the inline tool can be used where the hydro cannot and being made in USA at that price, I have both.
This may be what you are looking for.
http://buy1.snapon.com/catalog/item.asp?search=true&item_ID=89480&PartNo=FSDR1&group_id=20099&supersede=&store=snapon-store&tool=all
this is what i found granted i have not tried any of the products
www.denlorstools.com/home/dt1/page_12997/ford_spark_plug_blow_out_problems_how_to_repair.html - 41k
i was looking for a kit to do the triton engines that blow plugs there kit seemed to be the best wasnt sure if anybody had any experience with there product.