Where to find Graphite for the neck?

[Sercan Say]

I have an old czech bass, Neck was 4/4 lenght but we cut the neck for 3/4 and changed the fingerboard.

We aren't glued fingerboard yet and I thought we can put graphite bars in the neck ( I read about that in this forum) but I couldn't find an online store that sells them.I found some carbon fiber bars from stewmac.com.Is there any difference?

[Matthew Tucker]

that's the stuff.

Can you show the neck cut you did? that's exactly what I have to do to my czech bass.

[Sercan Say]

This photo not very clear but I can take pictures tomorrow.