Where to buy 4.09" pistons

Where to buy forget flat top pistons (plan to run with NOS) for 4.09" bore and 4" stroke. Deck height is normal 340 deck height. Block is X-block. I can easilly found 4.08 and 4.10" bore pistons but not 4.09".

What brand you recommend?

Engine is for street use, i driving with that Duster about 2000km/summer.
Engine data:
LA X block.
Eagle forget crank 4" stroke.
Eagle H-profile rods.
Flat top pistons, 4.09" bore
Hughes cam 260/264 0.050" with .62" lift
Heads flow 304/221cfm with .600" lift
Compresion 11.2:1
Edelbrock fully ported Victor intake
Quick Fuel Q-850AN carb
MSD pro billet distributor. MSD 6AL computer programmable ignition box with MAP sensor

Engine is not yet dynoed. I build engine end of last season. First full power launch i lost rear u-joint of drive shaft. (Brand new drive shaft and joint as well). Fixing and new try.
Second launch and rear axle tubes collapsed under leaf spring supports. Rear end was brand new Strange with 35 spline shafts with Strange HD housing. So I don't have any hp numbers yet...

I hope that someone can follow what i try put on the paper. English is not my strongest point, is so much easier use Finnish language when writing...