PSI Executive rollerball compatible tubes?

[Bleedaggie]

Hi! Having the worst luck with executive rollerball/fountain pens from PSI. I rarely experience blowouts, except on those, which for whatever reason I seem to blow out 80% of the time. Probably because I know PSI doesn't sell replacement tubes. Anyone know of a kit with compatible tubes from PSI or elsewhere that I could buy?

 

[Edgar]

I presume you are talking about the Magnetic Cap Executive RB/FP? If do, you can buy 10.5mm & 12.5mm tubes from a number of suppliers - Exotic Blanks, for one.

 

[Bope]

Why do you need new tubes? Just turn off the rest of the blank and put a new one on it. It takes more time tracking down and ordering new tubes than it does to just turn off the blown out blank.