If you go to Jefferson Gun, be sure to bring your NRA membership card. They discounts on transfers for NRA members.
That is who I used last time it was $25 plus tax with NRA Card. The guys are top Notch there as well.
http://fflgundealers.net/paul-j-prokop.html - $15 transfers - lowest in Metro area unless you are member at St. Bernard Indoor Shooting Center($10 for members).
I use Paul j prokop. They are $20 since the beginning of 2019 unless they've only been charging me extra $5
I've been using Paul Prokop at Kenner Kourier Service for years. You are correct, they recently went up from $15 to $20. Still a great deal, considering some places that shall remain unnamed charge up to $45/$50. Ridiculous.
Only down side to Prokop is the hours at Kenner Kourier. They close at 1:00 pm.
For just $10 more my buddy Bruce with Big Easy Gun Works will work with your schedule and make himself available when it is most convenient for you. He's a great option for people that need an FFL after normal business hours. Great guy. Office right off the service road in Metairie near Cleary.