Try Sportsman’s Cove in Webster SD. Otherwise I would check with a couple of the Watertown SD stores (Cowboys? or something like that) or down to the SE part of SD in Sioux Falls is a Scheels which would probably be your best bet for selection and brand types even though they aren’t in NE SD.
Give the cove a call at +1 (605) 345-2468 they also do a fishing report just about daily or at least every few days. If you try scheels in Sioux Falls you might as well try the scheels in Fargo ND as well