6 trimmer resistors 20Koms

This is the only parts holding me back from completing my ambika(for the voicecards). Looks like mouser and digi wont have them till the end of December. Is there any substitues for these? Like a different Koms? Looks like I found some others but they have differnt Koms like this one

http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_1875466_-1

newark have them in stock

Thanks! Now I can finish it sooner. Really appreciate the help!