[sdiy] How available are these parts to you?

[Ray Wilson]

How hard do people perceive getting these parts to be on a scale of 1 to 10. 
With 1 being hard/expensive to 10 being easy/not-as-expensive. I'm working 
on something new and I want to make it so that the parts are as available as 
possible.

1) LM3080
2) CA3080
3) CA3280
4) LM13600
5) LM13700
6) Roll your own simple transconductance amp with transistors/op amps.

Any feedback appreciated...

Thanks

Ray