The 40S&W to 357 SIG and reverse caliber conversion requirement for the P229 and P226 is just a barrel change.
For the P239 it is a magazine and barrel change.
You may try Brownells for the part. You may spend a little more but anyone who did not like what they got or had a problem with what was received there is a great customer service policy. (http://www.brownells.com)
You get what you pay for front end or back end.
Be safe and keep the brass flying,
Terry Peters formerly known as PT-Partners http://www.pt-partners.com
<font size=-1>[ This Message was edited by: Terry Peters on 2001-10-13 09:36 ]</font>