does anyone know how tungsten weights are made? and is it possible to pour your own?if so that would be great considering the outrageous cost of these things

Short answer, for the normal consumer, no it is not possible to melt tungsten and pour your own weights. The melting temperature of 5200+[ch8201]°F is the highest of all metals. Bismuth is a good alternative if your looking for a lead substitute.

not looking for a led alternative...just trying to save some dollars...haha guess i will not be pouring any

I was also under the impression that tung is much more toxic in a molten for than lead so home pouring would create many hazards, I may be incorrect though.

There is no way you could melt it.  BigBassGuy is right.  They use it in NASCAR stock cars for weight because of its small size and heavy weight.  Just a fun fact I thought I would throw out there. :

my father has a metal lathe i made some brass weights on it one time just killing times...i know its not very practical but they turned out good...i guess ya just gotta shell out the extra money haha...

Just buy them.

You shouldn't loose many weights, unless you are throwing into lots of structure, like places on Kerr.  

Tungsten isn't poured.  It is sintered powder, metal powder pressed under heat into whatever shape that is needed.