I think your IT/webmaster guy is screwing with you. All the assets (artwork, design, etc.) are already in place, unless this is a complete redesign. Cart software is pre-written and easily available (even for free), and already in place.
I did web design for several years in the early 2000s. Things were a lot more difficult then, and we used to turn out new design websites in four weeks, complete with e-commerce features, stocking updates, etc. Rolling out changes might take a week or two, and we were writing code from scratch. You think a guy like Don at BWB has a full-time IT guy on staff? Even he has stock updates.
Sorry, I was under the impression (from Toni) probably a month ago that the new site was around the corner, not 5 weeks (which in web design speak means 8 weeks) from implementation, meaning a total time in the range of 10-12 weeks total.
Oh well, at least it's coming eventually.