Hood support inserts

[72bigred]

Just wondering what is being used as the hood inserts for under the braces on this 60 hood. I have a set of these foam type pads but they do not offer the support to keep the hood as straight as it should be. I would like to get something in there to get it stiff enough to actually block it out and shoot it and these foam inserts are just not cutting it. I have it shimmed up currently with door shims but they obviously cannot be permanent and would like to put something in there and be done with it.

Thanks in advance