Speaker Bracket Dimensions Wanted

[PDXk5]

Does anyone have a Blazer center dash mount bracket (like the one in the image below) they could either get dimensions and forward to me or loan me their bracket so I can use it as a pattern to have some brackets fabricated?

Here is a link on the subject of the different speaker brackets:
http://67-72chevytrucks.com/vboard/s...d.php?t=522444

And a link to the thread where I just bought a speaker assembly so you can see the discussion:
http://67-72chevytrucks.com/vboard/s...=798672&page=2

Thank you!