I had already jumped in on the ih8mud thread and volunteered to be a test vehicle. I'm in Oregon but would gladly take a road trip to help figure this out.
I'm sure there's a lotta guys closer than me, but if someone has to do it I'm in!
The 5th Gen market is "SADLY" lacking in this department and I want to support a company that can make it happen. $1700 does seem a little steep, but I bet a custom tank wouldn't be much cheaper with a whole lot more things to figure out on your own.
This looks to be shaping up as a complete kit, which is a pretty sweet deal.
I don't think $1700 is actually that steep for a quality product like this looks to be. I remember seeing a thread somewhere about a guy who had a custom tank made at a shop that looked very similar (but filled from the trunk area) and it was a $4-5k one-off project.
Side note: here's a picture of what the combo gauge+pump switch looks like: