Can you place old lens in new frames if you still have them in stock? If you can - will it take more than a day? Brought frames there some years ago.

Probably not, they don't have a lab there and have to order everything. You're better off finding some place with a lab in-house.

Yes. They can place an existing pair of lenses into a new frame if they have the same frame in stock. Sometimes a frame will be discontinued and they can potentially have it transferred from a different store. As long as the frame is in stock the switch can be done in just a few minutes.