For-A FA-440 digital time base corrector service manual?

[AndrewEp17]

I have a for-a digital TBC from the late 80s or early 90s that i got off ebay for video bending (glitch art) and vhs tape backup. It works fine but i can't find the user manual or service manual anywhere on the internet and i even tried emailing the company but they never responded probably because i wasn't a company or something. Does anybody know anywhere i could find manuals? It seems like a very obscure piece of equipment sold to broadcast stations for stabilizing analog videos and it probably wasn't sold to the public