Not finding the right caps

I'm thinking about changeing the electrolytic caps in my MM 212 130 hd and I have a little problem.
I don't seem to find any 150 uF 50 V elektrolytic anywhere here and the 20 uF 25V are also very hard to get.
So I wonder if it would be okey to wire a 100 uF and a 47 uF in parallell to get 150 uF and if 22 uF is a good substitute for 20 uF?
Or if anyone knows a good place where i could order 150 uF and 20 uF from it would also be helpful.

22uf is ok to sub for a 20 as long as the voltage rating is at or above the ones that are in it. Mouser SHOULD have everything you need in the correct values but with the voltage rating a little higher. Try these pages:http://www.mouser.com/index.cfm?&handler =data.listcategory&D=*20uf*&Ne=100&terms=20uf&Ntt=*20uf*&Dk=1 &Ns=SField&N=296+61320000&crc=truehttp://www.mouser.com/index.cfm?&handler =data.listcategory&D=*150uf*&Ne=100&terms=150uf&Ntt=*150uf*&D k=1&Ns=SField&N=296+61320000&crc=true
Or just go to mouser.com and search those values. The'll have them. Or yo call call triode elctronics-he'll carry them too.