Yeah, a bit more info on what kind of help you need would be better to understand your request. For example: do you need help only updating the forum or also other 3rd party modifications? If you don't want to post it here for everyone to see be sure to include it if you contact someone.
And, as Miss_B already mentioned, it's also possible to hire someone else to do the upgrade for you. IPS even has an IPS Legacy Upgrades option in its Providers list in order to filter people who can specifically help with those: https://invisioncommunity.com/third-party/providers/?csrfKey=459adc615725b502b90da72ac661bcf0&advanced_search_submitted=1&sortby=primary_id_field&sortdirection=asc&content_field_124[1]=9