drop valve toilet flush

[handyman1]

where can i get a drop valve with a 2" pipe connection.the old valve with push button flush sat on a 3" hole with a 2 1/2 " thread leading to a 2" pipe reducing down to 1 1/2 " pipe to toilet pan. as far as i am aware the modern push button drop valves have a 1 1/2 "pipe connection. i think my old valve was european, please help. many thanks

[handyman1]

sorry everyone &quot should be the INCH sign.ie. 2 inch,3 inch, 2 1/2 inch, or 1 1/2 inch.