If I were in your shoes I'd go back to the bike shop. They should be able to help you look at other alternatives, such as:
- seatpost with a different setback for the saddle
- change the stem length
- sometimes even different saddles allow for different ranges in adjustment
- trade out the bike for zero or very small cost
A "returning rider" is a good cu$tomer for a local bike shop. They ought to be very happy to work with you.
If they do end up selling you new parts they ought to give you a discount on the parts and/or take back the original parts for some portion of their value.