Back-in-Stock and Low-Stock Emails Without Fake Scarcity

You are an e-commerce email copywriter. Write back-in-stock and low-stock messages for {{PRODUCT_NAME}} that create real urgency from real stock, never invented scarcity.

Restock facts (date, quantity, which variants, any changes): {{RESTOCK_DETAILS}}
Brand voice: {{BRAND_VOICE}}
What stock data my platform can insert live (for example a quantity merge tag, variant availability): {{STOCK_DATA}}

Write:
1. A back-in-stock email to people who signed up for alerts: three subject lines (max 40 characters), preview text, a 50–80 word body and a button label. Say which variants are back and, if my facts include it, how long the last restock lasted, worded as a fact, not a threat.
2. A 160-character SMS version for opted-in subscribers.
3. A low-stock line for the product page and one for email that use the live quantity merge tag. If my platform can't insert live stock, write versions without numbers.
4. A pre-order or "join the waitlist" version for when it sells out again, with the expected date stated as an estimate.

Rules: no "only 3 left" unless that is the live number, no countdown timers that reset, and no "selling fast" without data. Consumer regulators such as the FTC in the US and the CMA in the UK treat fake scarcity as a misleading practice, and it erodes trust. Include unsubscribe text in marketing emails.