Can't recall price. A quick email to AHPC and they will get you a quote including delivery. From memory the glass one was cheaper but as I sail sloop I thought it was better to go with the ring.

I race at RQYS most Saturdays, weather permitting (which it hasn't been this season). Come down anytime. It is fairly similar to the F18 setup and they generally race at Humpybong on the south side of Redcliffe which is closer to you.