hello ,,cross refrencing your western feild model 15 comes up as being a mossberg model 80 bolt action ,,but checking the model number in my refrence books it comes up as a 410 mossberg ,,are you sure on the number? ive came across alot of numbers lately that don't cross over ,,and they have to had been made by someone because westernfeild only was the trade name for guns made by a major manufacture then they were marked with wards "western feild" trademark,,heres a cross reference list for you to see what i'm talking about
http://www.e-gunparts.com/crossref.asp double check your number ,, gunparts usually carry alot of parts and you can look to see if yours is here but i can't find it and i've checked 2 different cross refrences sites and neither list a K15 or even 15K under western feild ,,i'm guessing it was made by mossberg but thats only a guess ,,and without having a exact nmatch it's gonna be hard to order parts for
,,i'll keep looking and see if i can come up with a crossover model and if i do i'll look at some parts sites and see if i can find ya the parts your looking for and repost the links for ya ,,drop me a pm so i can keep your question open and i'll reply when i find something..if it is a mossberg heres a site ya may be able to get the extractor from ,,does it have a left and a right extractor? if so look here
http://www.havlinsales.com/ let me know if you find it and mabey i can stear ya to some parts dealers ,,
bigcurt