Made-to-measure flow, how do you handle 4-16wk lead-times in Magento?

The classic wedding bug: bride orders a made-to-measure gown 3 weeks before her wedding, vendor can’t ship in time, chargeback + one-star review + social-media drama. Three pieces wired together prevent this:

• Body-measurement guide at PDP, bust / waist / hip / hollow-to-hem / inseam captured as Magento custom options on configurable products. Optional virtual tailor consult booked via embedded Calendly with the SKU pre-filled. Measurement history saved to customer account for repeat bridesmaid orders.
• Per-SKU lead-time attribute, 4, 6, 8, 12, or 16 weeks depending on dress complexity + fabric availability. Displayed prominently on PDP (“Ships in 12 weeks, order by July 8 for an October wedding”), in cart, and in order confirmation. Re-computed if personalization options bump the lead-time.
• Hard cart-block, a custom checkout field captures the customer’s wedding date. If the date is inside the lead-time window for any item in cart, checkout is blocked with a clear message + offer of rush-order upgrade (if available) or alternative off-the-rack styles. Prevents 90%+ of disaster orders.

BHLDN, Anthropologie BHLDN, and David’s Bridal all use a variant of this. Pattern is reusable across veils, custom invitations, and personalized gifts.