Do IMO have their own OPC Server application?

Yes! It's called Odin, and is available for download from the
'Downloads' section of the website.
It supports all of the protocols supported by the MI HMIs, plus G Series
Ethernet communications.
Any application which provides an OPC Data Access v2.0 interface can
connect to it, to read and write data to/from the connected PLCs.
Odin supports multiple ports and protocols, allowing data from several
sources to be pulled into your PC application.
The download provided will run for one hour unlicensed. A low cost
licence can be purchase from IMO, please contact us for details.