Depending who you know etc... I was about to replace the cats on my V6, but an analysis found that the flange was the real fault, the actual 'catalytic bit' was fine - a common fault, and looks like the same as yourself. I ended up getting a new flange welded on both. (from another scrap exhaust - the one that came off the car, in fact, as I was replacing the mid and end sections)
1 Beer money/matesrates for a couple of new flanges to be put on
2 Used - ideally collect them yourself, you know how delicate they are, they don't like being chucked around. I know it's not the cat section, but I got the two middle and end sections for £20, fitted now, easily got 3-5 years in it, I'd say.
3 Brand new Vx - pick an organ you wish to donate.
4 Brand new pattern - feels good now, but
if it dies after 2 years, then you start to grumble and wish you'd done option 1, 2, or 3.
Just search on heebay for 'scrap catalytic converter' in sold items and you'll see that prices are roughly in the £30-60 region. Now whether you get a decent-looking used pair, or brand new at whatever price, you'd be hopefully recouping about £60+ flogging off your old ones, and the same again when this new exhaust goes pop (be that in 1 year, or 18!) There's lots of 'ifs' and 'maybes' I know. It's sort of one of them things only you can decide, really.
You're always going to get the mix of opinions from "I'd never buy a
used exhaust - eww! Think I live in a council house, or something?!" ... to ... "I'd
never buy a brand new Vx exhaust! Think I'm made of money?!" and everywhere in between. Hope whatever you choose is economical and right for you and your Current Account doesn't dip into the red over it