Care to tell me which places in Denver would be willing to sell to me without the "official" card? You can PM me if you want, thanks.
When I first got my recommendation I thought the place I got my referral was the only way I could get my medication. I sincerely felt most places would only accept the "Red Card". After a few phone calls I found that the majority of the dispensaries will take your Doctor's referral as long as you also show proof on mailing and the state payment of the $90.

I recommend you take a good look on these forums and find the dispensary that seems to fit your needs. Hopefully you will find one convient and affordable. Once you pick the place you feel is best for you call them and confirm exactly what they need to take care of you.

Good luck and good health.