I'm hoping to put together a heavy spinning outfit but do not know where to find an appropriate blank. Ideally, it would be about 7 feet, have a bit of a fast taper, and be sturdy enough for 10 to 12 pounds of drag. Specific recommendations or being pointed in the right direction would be appreciated.
Thanks.

Sounds like a 30-50# rod? What are you going to use it for? You want a Composite, or graphite? I'd think you could take a blank such as a Calstar 700M or H and wrap it spinning, or a GUSA 70H-Plus or 70-Monster Mag & do the same.

Thankyou for the advice. What I have in mind is a 50# rod for large inshore fish like sharks, tarpon, etc . I'll look for the CalStar and GUSA websites and try to decide on materials etc from there.

50# rod for Sharks you might want to bump up on the Calstar to the 700H. For Tarpon, a lot of Florida guys fish much lighter than that, I think - 25#, but if you are around bridges and need that extra power to "horse" (can you horse a Tarpon?) them away.

Please note I have NO experiance with this type of fishing, I do not fish Florida, and never fish a SPinner. I just told you a couple of popular blanks for that pound test line. There are probably 10 others you can choose from.

The Seeker heavy jig rods have mostly faster tips such as you mention. Might be worth a look.