Inline grinder/cutoff tool

Been seeing these long neck inline cutoff tools on a couple of the car shows recently. Only vendor I've found is Eastwood. Seems like I really could use something like this as I do my bodywork. Couple times I just couldn't get it done with an angle grinder due to access. Anyone have experience with these or know of a hobbyist priced option to the Eastwood? I need several pieces of fab equipment so I'm particularly price sensitive, or I have to go without.

4 in. Air Cut Off Tool w/forward and reverse

There are lower cost types that are more compact but they don't look like they would give the flexibility of access.