d series sleeves

[slammedhatch13]

I have a d15 vtec block thats running in the car and then a d15 non vtec block on an engine stand, i wanta build a stong ass bottom end, where can i find GOOD sleeves for the motor,can i run a d16 crank, rods and pistons in these blocks? ive heard the d15b vtecs are basically the same bottom end as a d16. well just let me know so i can find and order