Does anyone have any background or experience with these?

These were given to me awhile back and it is time for them to get resurrected.

Any ideas where I can get surrounds for them?
Click image for larger version

Name:	Kirksaeter Monitor 141 Label.jpg
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Size:	513.8 KB
ID:	82771Click image for larger version

Name:	Kirksaeter Monitor 141.jpg
Views:	58
Size:	444.6 KB
ID:	82772