You presume much. Inexpensive components but actually Moto made nice frames even at that level.

You have four choices:

Straighten fork if repairable (you did not say why you need to replace the fork).

Find a French-threaded fork, built for a 27" wheel, with a long enough fork column. Best if it comes with headset.
http://www.ebay.com/itm/like/140650252393?lpid=82

Replace fork and headset with standard threaded, as well as stem and bars (arguably way too expensive, unless it's all used parts).

Say goodbye to bike.