I know my definition of a "cruise bike", but I don't know yours. That's the point. I need you to be more specific.
The Townie Go is a very affordable electric bike that I would put in the "cruiser" category, unless your local dealer is gouging. $1,699 for a name brand, dealer supported, high quality electric bike that should last years with good parts availability is priced right. The frame has rack bosses. Front baskets are also popular. It can be fitted with a range extender. If that's what you really want, I suggest that you save up for it, or ask your dealer about a layaway plan or financing.
So I gather you want to spend less, and want a 700c based hybrid, not a 26" large tire bike like the Townie. What does that mean to you? You said that you have a 28" (700c) wheel kit, you mean a hub motor wheel kit? That would mean a conversion, and that's not my department. You have a guy on here that does this for a living. Ask nicely, and maybe he can help you out.