If they can steal the bow perch from your mates garden I am not sure its the most secure place3 for him to keep his hawk
You can make them or you can buy em from online I got one from Crown Falconry but preffer the more expensive one from falconry fabrications just because that one is soild stainless where as my crown falconry one is stainless steel tube. You get what you pay for both work fine I just prefer the solid as opposed to the pipe
I am assuming it was a static bow and not a portable?
Crown Falconry do a fantastic portable about one and I filled it with lead works brilli