Tech Help needed

Hello all, I am in need of help again

Does anyone have, or know how to get a win8 Install disc??
Both my HP p7 towers Crashed on me.
Not only that, but the CRAPtop I was using also Blew
1 Tower Will boot with a Linux (Ubuntu) thoumb-Drive, but will NOT see anything on that H-D
Just that it is 1 TB and "UNKNOWN"
Not sure how I will retrieve anything off that
The other does NOTHING!!
only lights p the power on indicator
NO Monitor, etc

That H-d Is openable on the first tower and I am removing all data I can
but have run out of empty Thumb-drives here too!!

I do Not know if the "Recovery Partition" that is part of Win8 will work
It has not done a complete refresh, etc yet, so believe I need the install dvd

I MIGHT be able to pay $5.oo or so, but H-P or worse MicroCrap price......
I will wait to get a replacement PC

I hope some one can help.

Many Thanks
The-EDSEL (Dan)