For a minimalist, basically mail order business, in my experience, contact was best made in writing with attached blank stationary and s.a.s.e enclosed.
"Include 5¢ for catalog & pricelist" I.e. if it cost a penney that wasn't planned for, don't count on a reply. The SASE allow's a nearly on the spot answer in a less distracted setting at times.
Considering Olsen's is an old school business, I'd think about it at least.
Online orders without online reply or definite alternative method listed is kinda "wrong" in a way.
The closest I've heard of to that is a race shop that requires you to have all your records on hand, beginning with the customer number before they will begin a conversation. You can apply in writing for a customer number; applications take up to 12weeks. Then you can call with GENERAL questions. The in depth answers will be in print and there is a cost attached.A well established business themselves, esablished and responsible customers are appreciated. The "burden of proof" shifted keeps costs lower for us, and B.S. lower for them.
When you are well established, and offer a better selection at a better price than your competitors, you can be that way. Olsen's kinda fits the bill