NX .prt Files Needed

I need a library of featured mechanical parts and a few small assemblies delivered in native Siemens Designcenter NX (.prt) format. Each model must be fully parametric, cleanly constrained, and logically organised so I can edit dimensions and features without breaking the tree.

Scope
• Typical machined and sheet-metal parts such as brackets, shafts, housings, fasteners, and one or two mating sub-assemblies.
• Native .prt files only; please avoid exporting to STEP or IGES—I want to stay entirely inside NX.
• Geometry should open error-free in NX 2206 or later, with no missing links.

Acceptance criteria
1. Feature tree is editable and free of errors or broken references.
2. Dimensions and expressions are named clearly.
3. Layers, colours, and component names follow a logical scheme so parts are easy to identify.
4. Assemblies include correct constraints and explode views for quick visual checks.
5. A brief read-me lists model versions and any reference standards used.

Let me know how many unique parts you can provide, a sample screenshot of your modelling style, and the turnaround time.