Threaded .45 for a Para O

[CANNONMAN]

Greetings. I got a great deal on the Para .45 during a Sportsman Warehouse sale. Less than $200. I want to put a threaded barrel on it. Did not see a price tag of around $300 coming. I know quality costs but, any ideas on were to look for a better price?

 

[jlpskydive]

Which type of Para? Ramped barrel? If so check here