Converting 30 Luger to 9mm

[Revolvr]

I have a '20 or '23 DWM commercial Luger in 30 Luger, all numbers match but has been refinished. It's a good shooter and I'd like to shoot it more, but the ammo is hard to find and expensive. Done a bit of searching in this group and here are my options as I see them:[list=1][*]I'm crazy, 30 Luger is much more fun to shoot. [*]Have someone bore out the barrel to 9mm. Who could do this and how much would it cost? Would it add or subtract from the value of this Luger (which I picked up for $550). Also I will need a 9mm recoil spring right?[*]Find a 9mm barrel/receiver assembly on eBay, swap it in when I want to shoot 9mm. What would be a fair price for this assembly? What other parts should I get to assure something that might be reliable? (Side plate? toggle assembly?)[*]Replace the barrel with a 9mm barrel.[/list=1]
I am leaning towards 2 or 3. Item 3 seems the most interesting. These parts show on eBay all the time. But, given the close tolerances required, am I likely to end up with a parts gun that shoots reliably?

Asking for your expert thoughts and opinions.

thx

-- Dan