Allnic 1201 replacement tubes?


Hello all ...I have an Allnic 1201 phonostage and I think the Mullard E180CC’s are nearing the end . Should I pick up the same NOS Mullards are there alternatives where I won’t lose performance? 
Also they seem difficult to pull . Like they are loose at bottom and will just rip apart but I might be overthinking it..? Thanks 

VPI super prime scout 
tekton encore
manley snappers / jumbo shrimp
128x128tommypenngotti
FWIW, the puller in quesrion looks like an enlarged staple puller and works the same way. Did you ask Albert about the give away tubes? Enjoy the music
@tooblue 
I did ask Albert , he didn't know anything other than standard warranty replaces tubes within a year for free... 🤷🏻‍♂️ thanks 
I would be very careful without the tube puller tool.   It’s a bit challenging even with the tool.
@pops I found the tool , it is very difficult to pull tubes , you’re right ! What a hassle . On top of that , now my left side is acting up , low volume and not as full , like a cold solder joint , 😫 even changed tubes , same result .