Constant or Ported Vacuum Source for Distributors? ...AGAIN!

They are becoming a issue for me also, NOS mopar are to much to have on the shelf, seem the straight arm is 440 points, but it is also on some 383? Confusing as hell to figure out in a listing.
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The first picture, can on the left is what need ! Do you have any good replacements availiable ?On my oem distributor the arm is stamped 13L ....