Как получить торговые предложения по ID основного товара в 1С-Битрикс

<?php
require($_SERVER["DOCUMENT_ROOT"] . "/bitrix/modules/main/include/prolog_before.php");

use Bitrix\Main\Loader;
use Bitrix\Catalog\PriceTable;
use Bitrix\Catalog\StoreProductTable;

if (Loader::includeModule("catalog") && Loader::includeModule("iblock")) {
    $productId = (int)$_GET['PRODUCT_ID'];
    $result = [];
    
    if ($productId > 0) {
        $offers = CCatalogSKU::getOffersList($productId, 0, [], ['ID', 'NAME']);
        
        foreach ($offers[$productId] as $offer) {
            $price = PriceTable::getList([
                'filter' => ['PRODUCT_ID' => $offer['ID']],
                'select' => ['PRICE']
            ])->fetch();
            
            $stock = StoreProductTable::getList([
                'filter' => ['PRODUCT_ID' => $offer['ID']],
                'select' => ['AMOUNT']
            ])->fetch();

            $result[] = [
                'ID' => $offer['ID'],
                'NAME' => $offer['NAME'],
                'PRICE' => $price['PRICE'] ?? 0,
                'STOCK' => $stock['AMOUNT'] ?? 0
            ];
        }
    }
    
    header('Content-Type: application/json');
    echo json_encode($result);
}
?>