Try Aerofairings out of Quebec, Canada. Theirs is a complete nose bowl - top and bottom matched. Perhaps more than you wanted to spend but you get it all matched together, and the exchange rate definitely works in your favor!

http://www.aerofairings.ca/parts.htm

Scroll down the list near the bottom of the 150/152 section and see:

A154- NOSE BOWL ASSY upper/lower section (Matched Units) (C-150 pre1070) $965.00can

1968 150H C-FCUT