Identify a FET on CNC drive card?

[archer6817j]

Hey all, I wasn't sure where to post this but here goes...I think I have a bad axis drive card. After doing some research it seems like the MOSFETs often go out...I'd love to replace them rather than spending something like $1500 on a new card. However, the machine is from '91 and the part is obsolete. Can anyone suggest a suitable replacement? I did some looking on DigiKey and Mouser but I didn't have any luck finding the right part. Here is a photo and specs for the original part.

This is for the A axis, so I don't "need" to run the machine. Although, I'm running parts right now and don't want to tear the machine apart if I can't actually get the replacement parts. So, any help would be greatly appreciated!

This is for the original part number;
Manufacturer: IXYS
Product Category: MOSFET
RoHS: RoHS Compliant Details
Transistor Polarity: N-Channel
Drain-Source Breakdown Voltage: 200 V
Gate-Source Breakdown Voltage: +/- 20 V
Continuous Drain Current: 50 A
Resistance Drain-Source RDS (on): 0.045 Ohms
Configuration: Single
Maximum Operating Temperature: + 150 C
Mounting Style: Through Hole
Package / Case: TO-204AE
Packaging: Tube
Fall Time: 16 ns
Forward Transconductance gFS (Max / Min): 32 s
Minimum Operating Temperature: - 55 C
Power Dissipation: 300 W
Rise Time: 15 ns
Factory Pack Quantity: 20
Typical Turn-Off Delay Time: 72 ns

 

[Toaster79]

The only thing I could find, to replace this HyperFET is IXTH50N20 or IRFP260NPBF but both are TO-247 casings, so no direct replacement.