Yep. "Great Stuff" can build volcanos or plug a hole. Squirt it there and trim it off when dry.
any concerns with debris getting in the open end?
Awesome! We need pricing!
Just got an email from the people at Shrockworks (A day after I sent it - they have great customer service!) I talked to Mark and he said they have finished a prototype and should be ready to start building them soon. Price will be around $240 for the pair.