Hi trueplay:
No, I don't think you can find that Gosen string with TW. Probably available in Asia only?
OK, you can try this one: Dunlop Max Comfort 17. Low cost. Good multi. May stretch a bit. Available at TW.
What I use now (and most probably will ever use) is the Gamma Synthetic 17 with wearguard. Good pop and control. Soft-playing low cost synthetic - almost as soft as the Dunlop. And doesn't stretch easily. Available at TW. (I bought mine locally in 200-meter reel.)
I tell you, the Gamma string that I use is really good synthetic. Better than the Prince Original Synthetic. And chaper.
If you want to try the Redondo Mid, have you checked my post on my testing it?
Cheers.