Arco Trimmer Caps

[HSL at hgipdx.usa.com]

Ok I know this is not a direct contest question but I need a
source of Arco mica compression trimmer capacitors model no's
427 (300pf) and 429 (400pf). I'm hurriedly building some 80/160
preamplifiers for my EWE antennas per an old QST article.
I need 4 ea. and am having trouble finding them. Please respond
direct so as to limit the bandwidth. Thanks in advance
73,

Hank Lonberg/KI7YO
HSL at HGIPDX.USA.COM