I agree, just walk in. I do everything but embroidery but I needed a jacket done and went to a local embroiderer and then we talked and he does not offer screen printing or
dtg so I do all of those items for him and he is able to now offer more services to his customers as well, I was glad I went to talk to him because he has given me quite a bit of business.
Just do it, it cānnot hurt and I bet you find they will be glad you stopped by. It can be win win for both of you.