Gill Fluke In Discus - How To Treat

Hi all what is the best and straightforward treatment for Gil Fluke in my Discus I have been looking on the internet and it is a minefield ? They say that Prazipro is very good the only problem is that you got to order it from the States.
I Have used Wormer Plus for the first 4 days and Double Dose for the next 4 Days before doing a 50% water change which does say on the Packet for Gill Fluke.
What other Treatment which is out there if I got to Treat further or to keep for future

Have you tried any of these:
eSHa gdex, active ingredient praziquantel
Waterlife Sterazin (don't know active ingredient)

Thank You for your reply No I have not used any of the above.