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
thanks guys ...Albert Porter also explained about the gel platform ...I bought this used and don’t think I have the tube puller . Albert recommended something wood of plastic to pry So I don’t get a voltage shock from built up caps . Thanks
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.