Orange Capacitors...Please Help

[rider]

Hi !
I need to reverse an existing board which is delta-modulator for speech application. The existing board has some big plastic box capacitors(orange color) and non-standard capacitances. They are from siemens but i can't figure out whats their type (i guess they are Polystyrene (Styroflex?) . I think they are obsolete now? If not where these could be available? If not what could be the replacement?
Please see the pic showing a sample.

Please help.

Rider

 

[sreten]

In my limited knowledge of such things they are unlikely
to be polystyrene, and polycarbonate or polypropylene
types shoud be fine as an equivalent.

🙂 sreten.