Dino - that's going to be some work to find exactly what you specified. The Kono 240 Funy/Gyuto's are normally about 230-232 ish on the edge, quite a bit shorter than your 250-ish Ikeda. I know exactly what you mean on the Ikeda, I have one and it's actually shorter at the heel than most - they are quite light, but w/o that extra blade weight to help drive it though product.
If you want a pretty flat profile, but don't need that exact KS - Funy/Gyuto style tip, you should take a good look at the Tetsuhiro White #1 240 Gyuto: http://www.chefknivestogo.com/tehawh11.html
. I hope Mark will get these back in stock. The profile is quite flat and they definitely have some weight/backbone to them.
Another interesting possibility might be the Kono Fujiyama White #2 270 Gyuto: http://www.chefknivestogo.com/konosuke8.html
. I don't know if every sample will be close, but the specs list it a 260 on the edge - in your range IMO.
The Kono Fujiyama Blue #2 270 Gyuto: http://www.chefknivestogo.com/kofubl2gy27.html
is also listed as 260 on the edge.
Heck, the Moritaka KS 250 Gyuto: http://www.chefknivestogo.com/moritakagyuto.html
is the same shape and length
. It's nowhere near as thin as the Ikeda though. If you're looking for similar performance characteristics, you need a knife that's quite thin at the edge, with great geometry, and a nice thin tip via distal taper on the blade IMO. "Cough...Fujiyama...cough"
Edit - another option is this bad boy: http://www.chefknivestogo.com/funa24gyocha.html
. If Mark ever gets them back in stock