The part number for the valve is what you need, the description likely is why you are seeing diverters.
The valve, linkage, and tubing are in the MF 265 parts books for both the single and two spool valves so you can compare what you can salvage from your existing single spool valve.
Use this link to go to the AGCO parts site. A direct link to the books don't always work on that site.
AGCOparts
Once there Click on the words Parts Book to open the parts books search page.
On that page you should see Search by Model underlined in red. Type: MF 265 (just as I show here) in the search box below the red line.
In a few seconds you should get a drop-down list of MF units (4) with 265 in the model name.
The parts book for your early serial number MF 265 is the first one in the list. Click on it and the parts book will open for you. Use the index on the left, scroll down and you will find parts breakdowns for the Different auxiliary hydraulic system set ups (there is even a three spool one, not as common to my knowledge. Using the part number for the valve i think you will find PartsASAP shows they have a used one. The question will be do they have all the related parts to operate it.