Where to get impact brass transfer port?

Ok, try opening up the brass transfer port on my 25 Cal impact to get more air through. Went from 830-840ish to 855-865ish. A bit more speed but not that big. But now the port is bigger, when I load a pellet slowly, the tip falls in the hole and jam. Have to use a rod to push it back out. Only way to not get jam is to load it fast, or turn gun on it's side so the pellet tip dont drop in the hole. Kinda annoying. So trying to look for a replacement part. I just need to brass transfer port part, not the whole barrel. Where can I order one and how much? Link it up. Thanks 

Note to others. Don't open the transfer port too big, the pellet tip will fall in and jam. 
 
Yeah I should of went longer. Not wider. But I wanted a circle look and not an oval look. It's too wide now so when loading, as the pellet gets to the transfer hole it tilts down and catch the port and jam. I tested 4-5 times, always jam if I don't quickly push the prob back to load or tilt sideway. Which is annoying. Hope fx sell it separately. $30 not bad vs 400 for new barrel kit.
 
Yes they definitely sell it separately, its cheap.

Do you know link where I can order online. Or do i have to call and order by phone .don't really like ordering by phone. I prefer placing order online. Easier imo.

Might be easier for you but its not how they work yet, call them or email [email protected]. Might take a few days for them to respond.