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If you don’t mind a blemish mark on your combination square then you can get a Performance Engineering Tools (PEC) combination square with a 12inch 4R blade. $ 38
https://taytools.com/products/pec…ion-square

If you prefer a 16R blade then you can get a comparable combination square for $ 39 here: https://taytools.com/products/pec…ion-square

Depending on how much you want to buy you can get some freebies here:
https://taytools.com/pages/free-offers