You can download the last publicly released version of Virtual Pascal (v2.1b279) here.
Virtual Pascal is no longer being developed. Allan Mertner, the last VP developer, is part of a VP-focused Facebook community page. You can get support there.
I used a DOS32 plugin for Virtual Pascal for some of my utilities. You can download the plugin here. Make sure you follow the instructions exactly. This plugin will only work with VP v2.1b279.