archery foam

I am looking for an expanding foam to fill gaps I can use lures for archery targets. I'm starting a shooting range in the local club, and told me to use the expanding foam to make "new depths" in 3-D targets. and use it in molds to create 3-D targets, which may be another arrow and time. has to be soft and dense. Cheap is always good. The expansion foam reindeer stores harden and crisp. Thanks for any and all advice.
The office housing local Home Depot or Lowes will have cans of expanding foam used as insulation. Should be close to the insulation or the cover. "Great Stuff" is the I've seen brand. Retailers Tap plastics such as plastic have a second part that expanding foam is mixed and poured. Both products adhere to anything and require mechanical extraction. Be careful with him.
JOAD sturday archery