How to get origin/destination arrows to reference proper row format (letter instead of number)?

Formula:

(VAL(FIL_NO), 2, 0) + " - (" + SYM_COL + ROW_TAG + ")"

Desired Output:

04 - (3B)

(sheet 4, column 3, row B)

Actual Output:

04 - (32)

Need to convert that 2 to a letter.

How?

SolidworksElectrical