I have an LV 4 driver for an HP 8116 function generator. If you think it might be of some use as a starting point, let me know. I opened it in LV 6.0.2 and it had some errors, which I did not examine. However, this indicates that the conversion might not be straightforward. From the style it appears that it was written by HP(Agilent) or NI, not me.
The best place to look for instrument drivers to use with National Instruments' products is www.ni.com/idnet. There are currently drviers for more than 3,000 instruments and counting. If you are unable to find the specific driver that you would like, you may request it and see if there's any possibility of one being created. If you have a driver that is not available on the instrument drvier network, you can also submit a driver for review.