Custom Forms for Inventory Items

We are in the process of making our procedure for creating new items "fool-proof". We have multiple categories for inventory items, and each category has attributes that only apply to that category.

For example: Our category stk-corr is for Corrugated boxes which have a tested strength and box type. These are custom fields we have added to the inventory item form. We have another category stk-bub which is for Bubble Wrap which has a thickness and width. These are also custom fields we have added.

What we would like to do, is have a specific form load when a specific category is selected. So when an employee goes to enter a new item, they select the category in which the item is to be filed, and it automatically loads the correct entry form for that category.